https://bugs.llvm.org/show_bug.cgi?id=40577
Bug ID: 40577
Summary: [clang-cl] [ms] Implement warning for shadowing of
template parameter extension
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: heavenandhell...@gmail.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
Clang usually warns whenever it compiles non conformant code that MSVC accepts,
which i think it's great. However, there is no warning for shadowing of
template parameters, which is illegal.
For exemple:
$ cat test.cpp
template <typename T>
struct type_t {
template <typename T>
void function() {
}
};
$ clang-cl -c test.cpp
No warning.
I discovered that this is ill-formed when i pushed some code and the GCC build
bot failed. It would be nice to have Clang warn about this extension.
Something like:
$ clang-cl -c test.cpp
test.cpp(3,22): warning: declaration of 'T' shadows template parameter;
ignored as a Microsoft extension
[-Wmicrosoft-template]
template <typename T>
^
test.cpp(1,20): note: template parameter is declared here
template <typename T>
^
1 warning generated.
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